Of what and to whom Amos' prophecy speaks: its style and subjects

The prophecy of Amos is one of those that speak of the moral
condition of the people, and especially of Israel, who, as we have
already seen in the historical books, represents more particularly
the people as such; while Judah was but as an appanage of the house
of David, although containing always a remnant of the people.

This prophecy, which does not extend so far down in the history
of Israel as that of Hosea, is less fervent than the latter; sin is
not pursued with that consuming fire of jealousy and of moral
revenge, which characterises the burning and broken style of the
prophet Hosea. Nothing, doubtless, can be more decided against evil
than Amos; but, although very simple, he speaks, as it were, from
higher ground. In Hosea we see the anguish of heart produced by the
Holy Ghost, in a man who could not endure evil in the people whom
he loved as being the people of God; while in Amos there is more of
the calmness of God's own judgment. There is much less detail with
respect to sin. Certain prominent transgressions of a special
character are pointed out, and the most complete and absolute
judgment is proclaimed.